Automatic valve.



PATENTED DEC. 31, 1907.

S. W. PEREGRINE. AUTOMATIC VALVE.

APPLICATION FILED MAY 15, 1006. RENEWED NOV.20.1907.

Mai/5 pany ing SEYMOUR W. PEREGRINE, OF PORTLAND, MAINE.

AUTOMATIC VALVE I Specification of Letters Patent.

Patented Dec. 31,1907.

Application filed. May 16. 1906. Serial No. 317,241. Renewed iiovember21). 1907- Serial No. 403.073.

new and useful Imprdvements in Automatic Valves, of which t tion.

My invention relates to improvements in automatic cut-oil valves forpipes or mains carrying fluid underpressure, such for instance as water,steam, or gas.

The object of the invention. is to provide a simple, economical, durable.and efficient valve which may beeasily set to-remain open as long asany pre-determined pressure exlsts in the main or pi e, but which shpuldthe below the pre-determined e'following is a specificaautomaticallyclose and will remain closed until mechanically opened again,irrespective of whether or not the pressure in the main on the inletside of the valve has been re-established. 1

-Wi'th these and possibly other objects 'in view, the invention includesthe features of construction and arrangement'and combina tion of'partshereinafter described and particularly set forth in the appended claims,

The invention is illustrated in the accomdrawings; in.which,'

Figure 1 is asectional elevation, and Fig. 2

lan view. i

11 these drawings, the numeral 3 designates an inlet pipe whichisrepresentative of a service pipeJFor conveying any suitable fluid,such for instance as steam y from a' 1 bo1ler-, water from a cityreservoir, or pump-- ing statlon, or

(gas from" any'ordinary source of supply; an 4 designates the deliveryp1 e. ca ing 5, to which thepipes may be connected in any suitablemanner. The valve casing is provided with a valve seat .6, which isdesigned to coactwith the face .7 of a check valve pivoted upon aextension of'the valve chamber. ward extension 10 of the valve chamberis so shaped that the valve may be'swung up into horizontal position, asshown in full lines in Fig. 1. It is provided with a recess portion 11which has agvent, opening preferably provided with a pet cock which'isshown at 12,

by which the space 11 is placed in communi- The rear side of ed so as tosnugly fit cation with the outside air. the check valve 8 is shap asagainst tlie'edges of this opening and 1t will W. Penn These' areconnected by the valve pin 9 in upward- This up- 'in presence of twowitnesses.

thus be seen that so long as the desired pressure exists within themain, the valve w1ll be held pressed against the seat formed by theedges of the recess 11, as the space recess and behind the valve beingin communication with the outside air, the fluid therein will be atatmospheric pressure.

In order that the valve may beadjusted for anypre-determined pressure alever arm 13 is connected to a pm or shaft 9, upon which the check valveis mounted and this lever arm 13 is provided with an adjustable weight14 which may be moved towards or from the axis of the valve. Suitablegraduations may be placed on the lever arm to serve asIa guide inadjusting the weight to set the valve for any desired pressure.

within the From the foregoing description it will be a seen that I provitomatic valve which may be produced at an extremely low cost and whichin casev the pressure in thesuppl main should for any reason be cutbfior owered beyond safety point the valve will-automatically. close theservice pipe so that uponre-establishing the pressure all danger of flowof open valves or service pipe will be avoided, as the valve can only beopened bymanually operating the same.

Having thus described my invention what I claim is A device forautomatically cutting off the e a very simple form of au- 7 fluid throuh burners connected witht e flow of liquid through a service plpecomprlsing a valve casing having an ingress opening n on one slde and anegress opening upon t e opposite side, said caslng havmg a recess in theupper part thereof, a flap valve pivoted in sa recess and arranged whenopen to lie wholly out of thev line of the ingress an egress pipes andwhen drop ed to close said egress pipe, and a vent in t e wall of therecessed portion and a supplemental recess insaid wall roviding a spacein rear of the: valve whic is closed against the escape of fluid fromthe-casing by said valve while it is elevated said recess having.inclined walls and said valve inclined shoulders corresponding thereto,substantially as described.

In testimony whereof, I aflix my signature SEYMOUR W. PEREGRINE.Witnesses:

THOMAS L. TALBOT, LYDIA H. Bison;

